The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2012
Filed:
Sep. 10, 2009
Michio Takagaki, Shizuoka, JP;
Akira Homma, Shizuoka, JP;
Yoshihiro Mochizuki, Shizuoka, JP;
Takeshi Fukuyo, Shizuoka, JP;
Michio Takagaki, Shizuoka, JP;
Akira Homma, Shizuoka, JP;
Yoshihiro Mochizuki, Shizuoka, JP;
Takeshi Fukuyo, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
In a mercury-free arc tube, regions including molybdenum foilsof electrode assemblies each of which is formed by connecting and integrating an electrode, a molybdenum foil, and a lead wire, are pinch-sealed where the electrodeprojects inside a closed glass bulb, which encloses luminescent substances, etc. The molybdenum foilis doped with or coated with TiOin the form of discontinuous lands and subjected to surface roughening by etching including oxidation and reduction. TiOparticles or a TiOlayer exposed on the rough surfaceof the molybdenum foilincreases chemical joining strength to glass and makes deeper, more complicated minute unevennesson the molybdenum foil surface to increase the mechanical joining strength to glass, so that even when a heat stress occurs at the interface between the molybdenum foil and glass in the pinch-sealed portion, foil floating does not occur.